What mass of carbon dioxide is produced when 10 g of calcium carbonate is completely decomposed by heating? CaCO$_3$ → CaO + CO$_2$ (CaCO$_3$ = 100, CO$_2$ = 44)
A5.6 g
B44 g
C4.4 gCORRECT
D10 g
JUPEBChemistryStoichiometry and Volumetric Analysis
AI
Toaster Teacher
Why the answer is C, and why the others tempt you.
Moles of CaCO$_3$ $= \dfrac{10}{100} = 0.1$; the equation is 1:1, so 0.1 mol of CO$_2$ is formed, mass $= 0.1 \times 44 = 4.4$ g. The remaining 5.6 g is the mass of CaO left behind.
Want this in Pidgin, Yoruba, Igbo or Hausa? Sign up free →
Practice more Chemistry questions
JUPEB Chemistry has thousands more questions like this — with Worked answers on every one.